The book "Calculation of heat gain through filling light gaps and massive enclosing structures" by L. In. Borukhova is a unique and in-depth study in the field of heat engineering and architectural design. This edition will be especially useful for both students and graduate students studying thermal physics and energy conservation, and for practicing engineers, architects and designers seeking to optimize their projects in accordance with modern energy efficiency requirements. In his book, Borukhov raises important questions regarding heat transfer through light apertures and massive structures. It analyzes how different materials and their properties affect heat flow, which is a key aspect in the design of buildings and structures. The reader will be able to learn about the methods of calculating heat loss and heat fluxes, as well as how to choose the right materials for enclosing structures in order to minimize energy costs and create comfortable conditions for living and working. The book stands out for its scientific approach and practical focus. The author uses many examples and calculations, which makes the material accessible and understandable even for those who are just beginning to get acquainted with this topic. Borukhov not only shares his knowledge, but also offers readers unique techniques that can be applied in real projects. This makes the book a valuable resource for anyone interested in modern methods of design and energy saving. The topics covered in the book cover a wide range of issues, including the effect of climatic conditions on heat flow, the design of light apertures, as well as the use of various insulating materials. Borukhov emphasizes the importance of taking into account all factors affecting heat transfer, which allows creating more efficient and sustainable designs. The book will be interesting not only to professionals, but also to those who are fond of architecture and construction. It can be an excellent addition to the library of anyone who seeks to understand how to design buildings correctly, taking into account modern requirements for energy saving and comfort. Readers interested in the topics of sustainable development and ecology will also find a lot of useful information in it. Borukhov's style is distinguished by clarity of presentation and logic. He is able to explain complex things easily, which makes his books especially valuable for a wide audience. L. In. Borukhov is the author of several other works on thermal physics and construction technologies, which also deserve attention. His research and publications are actively used in educational institutions and in practice, which confirms the high importance of his contribution in this area. If you are looking for a book that will help you better understand heat transfer processes and learn how to effectively apply this knowledge in design, “Calculation of heat gain through filling light gaps and massive enclosing structures” will be a real find for you. This publication will not only expand your knowledge, but also inspire new ideas and solutions that will help you in your professional activities.